1 ========================== 2 Kernel driver i2c-taos-evm 3 ========================== 4 5 Author: Jean Delvare <jdelvare@suse.de> 6 7 This is a driver for the evaluation modules for TAOS I2C/SMBus chips. 8 The modules include an SMBus master with limited capabilities, which can 9 be controlled over the serial port. Virtually all evaluation modules 10 are supported, but a few lines of code need to be added for each new 11 module to instantiate the right I2C chip on the bus. Obviously, a driver 12 for the chip in question is also needed. 13 14 Currently supported devices are: 15 16 * TAOS TSL2550 EVM 17 18 For additional information on TAOS products, please see 19 http://www.taosinc.com/ 20 21 22 Using this driver 23 ----------------- 24 25 In order to use this driver, you'll need the serport driver, and the 26 inputattach tool, which is part of the input-utils package. The following 27 commands will tell the kernel that you have a TAOS EVM on the first 28 serial port:: 29 30 # modprobe serport 31 # inputattach --taos-evm /dev/ttyS0 32 33 34 Technical details 35 ----------------- 36 37 Only 4 SMBus transaction types are supported by the TAOS evaluation 38 modules: 39 * Receive Byte 40 * Send Byte 41 * Read Byte 42 * Write Byte 43 44 The communication protocol is text-based and pretty simple. It is 45 described in a PDF document on the CD which comes with the evaluation 46 module. The communication is rather slow, because the serial port has 47 to operate at 1200 bps. However, I don't think this is a big concern in 48 practice, as these modules are meant for evaluation and testing only.
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